Dish washing machine pump and drain



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DISH WASHING MACHINE PUMP AND DRAiN Filed Jan. 14, 1963 6 Sheets-Sheet 1 IN VENTOR.

Oct. 29, 1963 D. G. BLAKESLEE DISH WASHING MACHINE PUMP AND DRAIN 6 Sheets-Sheet. 2

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DISH WASHING MACHINE PUMP AND DRAIN Filed Jan. 14; 196:5v 6 Sheets-Sheet 3 IN VEN TOR.

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afif'ya 3,103,667 DISH WASHING MACHINE PUMP AND DRAW David G. Blakeslee, Wheaten, Ill., assignor to G. S. Blalreslee & 60., Cicero, 1th, a corporation of Illinois Filed Jan. 14 1963, Ser. No. 251,286 8 Claims. (Cl. 134-186) This invention relates to machines for use in washing dishes and analogous purposes, and has to do with such a machine and an associated pump and drain unit.

My invention is directed to a dish washing machine having a pump and drain unit effective for supplying, under appropriate pressure, washing solution or rinse water, to spray means for projecting the liquid onto articles to be washed, such unit also providing increased liquid holding capacity and means for draining the machine. More specifically, the pump and drain unit comprises a sump of substantial capacity opening directly from the washing compartment of the machine and also opening into the intake of the pump. The sump receives liquid from the washing compartment and delivers it to the intake of the pump. I also provide the sump with an outlet and valve and drain tube means normally closing such outlet and operable for optionally opening the outlet, eiiective for draining the washing compartment and sump and also draining the pump. The sump has an opening, normally closed by a removable cover plate, giving ready access to the interior of the sump and to parts therein as well as to the pump impeller, for removal and replacement thereof as may be required, or for removal of articles which impede operation of the pump. Further objects and advantages of my invention will appear from the detail description.

In the drawings:

FIGURE 1 is a front view of the lower portion of a dish washing machine and pump and drain means embodying my invention;

FIGURE 2 is a side view of the machine and pump and drain means of FIGURE 1;

FIGURE 3 is a sectional view, on an enlargedscale, taken substantially on line 33 of FIGURE 1, certain parts being shown in elevation;

FIGURE 4 is a sectional view, on an enlarged scale, with certain parts shown in elevation and certain other parts broken away, taken substantially on line 4--4 of FIGURE 2;

FIGURE 5 is a sectional View taken substantially on line 55' of FIGURE 4, with the sump cover plate omitted;

FIGURE 6 is a view similar to FIGURE 5 but with the pump impeller suction ring and anti-vortex means omitted;

FIGURE 7 is a sectional view taken substantially on line 7-4 of FIGURE 3, with the bottom wall of the washing compartment broken away to show underlying parts of the pump and drain unit; and

FIGURE 8 is a sectional view taken substantially on line S% of FIGURE 3.

The washing machine of my invention may be of any suitable construction and is shown, by way of illustration, as being of generally box-like construction, substantially square in cross section, and having an upper dish washing chamber or compartment 10 containing spray means comprising a lower wash rotor 11, of known type, and an upper rinse rotor 11a also of known type, to which water is supplied, as desired, from the house water system and which need not be further considered here. Bottom wall 12 is provided, a short distance from the front of the machine, with'a circular outlet opening 13. A pump and a sump assembly is mounted beneath bottom wall 12 of washing compartment 10 and is sup.- ported by and suitably secured to a supporting or plat ddhdfih? Patented Get. 29, 1363 form structure 14 shown more clearly in FIGURES 1 and 2. The pump and sump assembly or unit comprises a sump 15 conveniently in the form of a casting and of approximately rectangular cross section both vertically and horizontally. As is shown more clearly in FIGURES 3 and 4, sump 15 is provided in its upper wall with a circular opening 16 which registers with opening 13 in bottom wall 12 of compartment 10. The top wall of sump 15 is bolted to the underface of bottom wall 12 of compartment 19, as shown, with an intervening gasket 17 to assure a leak tight seal therebet-ween. Certain of the bolts 18 for securing the top wall of sump 15 to wall 12, pass through end fingers or extensions of a guide bracket 19 of inverted U-shape overlying opening 13 and extending diametrically thereof. The guide bracket 19 slidably receives a drain tube or stand pipe 21 of cylindrical form. The drain tube 21 is slidably mounted, at its lower end portion, in a slotted sleeve 22 threaded into a casting 23 bolted to the bottom wall of sump 15, with an intervening sealing gasket 24. The lower end of drain tube 21 is tapered to provide a valve element 25 which seats on the valve seat 26 formed interiorly of sleeve 22. In the normal lowered position of drain tube 21 valve element 25 seats accurately on the valve seat 26 thereby closing the interior of sump 15 to the drain opening 27 extending from the lower end of sleeve 22. The opening 27 overlies a downward extension or nipple 28 of the casting 23, to which may be connected a flexible hose or other suitable conduit for conducting liquid from the sump 15 to the sewer or other suitable point of discharge.

A guide rib 30, welded to tube 21 lengthwise thereof, is slidable through a corresponding notch in the guide bracket 19. When the tube 21 is in its normal lowered position shown in FIGURES 3 and 4, the lower end of key 3%} is disposed in proximity to an appropriately formed cam 31 fixed upon the inner end of an operating shaft 32 rockably mounted through a sleeve 33 extending through an inwardly projecting boss 34 of a front cover plate 35 at the front of the sump 15. The body portion of plate 35 extends into a circular opening of substantial diameter through the front wall 36 of sump 15. The inner portion of plate 35 fits snugly in opening 37 of wall 36 and is provided with an 0 seal ring 31'; assuring a liquid tight seal thereabout. The outer portion of plate 35 seats on the outer face of wall 36 to which it is removably secured in a suitable manner, conveniently by bolting. An operating handle39 is secured on the outer end of shaft 32. The handle 39 may be turned in opposite directions through approximately such turning movement being limited by contact of finger 39a of handle 39 with stop lugs 4%} formed integrally with two upper corner bosses 41 through which securing studs 42, appropriately anchored in wall 36, extend. The plate 35 is also provided with two lower corner bosses 43 through which lower studs 44 extend. When the handle 39 is in its position shown in FIGURES 1 and 3, the drain tube 21 is in its lowered position, closing the-drainage opening 27 in the outlet casting 23 and the lower end of key 35) is then disposed a short distance above the'hub of the cam 31. Turning the handle 39 to its other position raises the drain tube 21 to its upper position, indicated in broken lines in FIGURE 3, efi-ective for draining sump 15, the washing compartment 1i? and the pump, as will appear more fully later.

A drain cup 46, open at its upper end, is welded to the upper end of the drain tube 21. A cover 47, spaced an appreciable distance above the upper end of cup 46, is mounted thereon by means of angle brackets 48 welded to cover 47 and extending therefrom downward into cup 46 and welded to the latter. The upper edge of cup 46 is disposed at the liquid level in the washing compartment 10, below the lower spray means in that compartment. The cover 47, spaced from the upper end of cup 46, permits flow of excess liquid and entrained food particles into the upper end of tube 2 1 and thence to the outlet opening 27 of the casting 23. Cover 47 prevents entry of large articles, such as dish cloths or the like which might inadvertently be left in the washing compartment 10, into the tube 21 with possible resultant clog ging thereof. Referring further to the upward extension or sleeve 22 of the drainage casting 23, it is provided with lengthwise slots or openings 49 through which the liquid in the sump drains when the tube 21 is in its raised position, as will be understood.

Referring to FIGURES l, 4 and 5, the sump 15 is provided, at one side thereof, with a torus-shaped pump impeller chamber 50 having a circular opening 51 into sump 15, chamber 5G preferably being formed integrally with the sump 15. A mounting bracket 52 having openings for ready access to parts therein, is bolted to the outer side of chamber 50 and is also bolted to the supporting structure 14. The bracket 52 is provided with a cylindrical extension 53 fitting tightly into a corresponding opening 54 in the outer wall of the impeller chamber 50 and providing a liquid tight seal therewith. The bracket 52 is further provided with a concentric inner sleeve 55 projecting outwardly from extension 53 thereof. A sealing assembly 56 is releasably secured in sleeve 55 by means of set screws. A stub shaft 57, shown more clearly in FIGURES 5 and 6, is rotatably mounted through the sealing assembly 56. A coupling sleeve 58 is fixed to the outer end of stub shaft 57 and receives shaft 59 of an electric motor 60 passing through an opening in the outer end wall of bracket 52, to which wall the motor 60 is bolted. Sleeve 58 is provided with a keyway 61 receiving a key engaging into a corresponding keyway in the motor shaft 59, the key being secured in position by a set screw 62 threaded in sleeve 58. A second set screw 63 is also threaded in sleeve 58 and is turned into pressure contact with the motor shaft 59. By releasing the set screws 62 and 63 the pump impeller assembly may be removed as a unit through the opening 51 in the end wall of sump 15, as will be explained more fully later.

Referring further to FIGURES 5 and 6, an impeller 65 is keyed on the inner end of stub shaft 57 and is restrained against trelative inward movement by screw stud 66 threaded into the end of stub shaft 57, in cooperation with a washer 67 seating on the inner end of the hub 68 of impeller 65 and a nut 69 threading onto the screw stud. The impeller 65 is provided with curvilinear blades 70 and is rotated by the motor 60 in counterclockwise direction as viewed in FIGURES Sand 6. In the rotation of the impeller 65 liquid from sump 15 is drawn into the impeller chamber 50 and is discharged therefrom, under appropriate pressure, through an elbow fitting 71, shown more clearly in FIGURES 2 and 7. The upper end of the elbow 71 is connected to header 7 4 which opens into the wash rotor 11, and header 74 is also connected by a conduit 73 to the header of an upper wash rotor (not shown) similar to rotor 11.

The opening 51 in the inner wall of the impeller chamber 50 receives an outwardly tapering suction ring 75 having at its inner end a beveled shoulder 76 seating on a beveled surf-ace extending about the opening 51. The ring 76 is provided with two diametrical ribs or vanes 77 extending inwardly of sump 15 to within a short distance of the drain tube 21. The vanes 77 function to suppress any vortex which might otherwise occur incident to operation of the pump and, in conjunction with the suction ring 75, are conducive to high efficiency of the pump. One of the vanes 77 is provided with an opening which snugly receives a positioning and supporting rod 78 secured at one end in a boss 79 projecting from the inner face of the cover plate 35. The other end of rod 78 is tapered and fits into a corresponding bore in a boss 80 4 extending inwardly from the wall of sump 15 opposite to the cover plate 35. The rod 78 serves to support the suction ring 75 and to position it accurately in the opening 51, as will be understood.

The central vertical transverse plane of the pump impeller chamber or housing 59 is disposed in the central vertical plane, from front to back, of the machine, indicated by the dot and dash line CC in FIGURE 1. The washing machine of my invention is for domestic use. Such machines often are placed in the corner of a room where space is restricted. If one wall of the room corner is at the left hand side of the machine, as viewed in FIG- URE 1, the projection of the motor 60 beyond that side would, in many cases, be objectionable as necessitating spacing of the machine away from that side wall of the corner. By having the pump impeller housing 51 disposed on the center line of the machine, as above, the pump and sump unit, including motor 60, may be disposed with the motor at either side of the machine. That avoids any necessity for providing right hand and left hand pump assemblies, thereby elfecting a material saving in manufacturing costs.

Referring further to FIGURE 3, the elbow 71 is bolted at its upper end to bottom wall 12 of washing compartment 10 adjacent one side thereof. It will be noted that the bottom wall 12 is inclined from the upper end of elbow 71 downwardly toward the opening 13 to assure drainage thereto.

The front wall of the washing compartment is provided with suitable means 180 whereby the level of the liquid in the washing compartment may be observed. The particular construction of the observation means 189 need not be described here, it sufiicing to note that any suitable means may be provided, within the broader aspects of my present invention.

The outer side wall 82, of sump 15 is provided with an opening 83 through which may be mounted suitable means for heating the water or solution used in the machine, such means being an immersion electric heater, a steam injector, or other suitable known means. In the absence of the heating means the opening 83 is closed by a plug 84 provided at its inner end with a peripheral flange 35. A bracket 86 bridges opening 83 and seats on the outer face of wall 82. A screw stud 87 passes through bracket 86 and threads into the plug 84 effective for urging the latter outward with flange thereof in pressure contact with a sealing gasket 88 seating on the inner face of wall 82.

In using the machine it is first filled to the proper level with water to which a suitable detergent has been added to provide a washing solution. The sump 15 and the impeller housing or chamber 56 are also filled with the washing solution, as will be understood. The drain tube 21 is at that time in its lowered seated or closed position, as will be understood. In the operation of the pump, the washing solution is projected against the dishes or other articles within the compartment 16 by suitable spray means provided therein, such as rotor 11. During the washing operation additional water may be supplied to the washing chamber or compartment by known means. Excess water in the compartment 10 flows into the cup 46 and thence through drain tube 21 and opening 27 to the sewer, carying with it entrained food particles. Upon completion of the washing operation the motor is stopped and the machine is drained by raising tube 21 to its open position. The washing solution flows from compartment 10 and sump 15 through the opening 27, the impeller housing 50 and the elbow 71 draining into sump 15 through opening 51. For the purpose of draining the impeller housing 54 below opening 51, a nipple 89 is provided at the bottom of housing 50, this nipple normally being closed by a screw plug 90'. After the washing compartment or chamber 10 and the sump 15 and impeller housin g 50 have been drained as above, screw plug 90 is removed and the lower portion of housing 50 and the elbow 71 are then drained. The screw plug 90 is then reinserted, drain tube 21 remaining in its raised and open position. The dishes are then rinsed by rinse spray means (not shown) in the washing compartment. Water from the house water system is supplied to the rinse spray means, as is known, suitable known control means being provided for controlling supply of water to the spray means and for interrupting such supply during the washing operation. During the rinsing operation the machine is eflectively washed out and cleaned by the rinse water.

As will be clear from FIGURES- 1 to 4, inclusive, the drain tube 21 is disposed to one side of the spray means 11 and toward the front of the machine. Ready access may be had to the suction ring '75 and the pump impeller 65, by removing the drain tube 21 and the cover plate 35 of sump 15. Removal of the cover plate 35 withdraws rod 78 from the vane 77 of the vortex suppression means. The suction ring 75 and the vanes '77 may then readily be removed as a unit rendering the impeller 65 readily accessible. By releasing the set screws 62 and 63 the impeller unit, including the sealing means '56 and coupling sleeve 58 and associated parts may then be withdrawn as a unit through the sump 15. The pump impeller and associated parts may as readily be replaced as will be understood. In addition to giving ready access to the pump impeller unit and the associated suction ring and vontex suppressing unit, removal of the cover plate 35 gives access to the interior of the sump 15 for removing therefrom foreign materials, such as excess amounts of food soil, dish cloths or other articles which may have passed into the sump 15 from the washing compartment it).

As above indicated, changes in detail may be resorted to without departing from the field and scope of my invention, and I intend to include all such variations, as fall within the scope of the appended claims, in this application in which the preferred form only of my invention has been disclosed.

'I claim:

1. in a dish washing machine comprising an upper Washing compartment and spray means therein, said compartment having a bottom wall provided with an outlet opening, a sump underlying said bottom wall in sealing engagement therewith and having an inlet opening aligned with said outlet opening, said sump having side walls and a bottom wall with a bottom drain opening and an adjacent valve seat, a vertically adjustable open ended drain tube aligned with said drain opening and valve seat and extending through said sump and upwardly therefrom into said compartment, a pump comprising an r impeller chamber with an intake opening through a side wall of said sump and an impeller in said chamber removable therefrom through said intake opening into said sump, said pump having a discharge connected to said spray means, said tube having at its lower end a valve element cooperating with said valve seat to close said drain opening to the interior of said sump when said tube is in its fully lowered and closed position, means for moving said tube to its said fully lowered and closed position and to an upper open position with said valve element spaced above said valve seat effective for opening the interior of said sump to said drain opening, another side wall of said sump having an access opening of a size to accommodate passage therethrough of said pump impeller, and a cover plate for said access opening removably mounted on said other side wall.

2. In a dish washing machine comprising an upper washing compartment and spray means therein, said compartment having a bottom wall provided with an outlet opening, a sump underlying said bottom wall in sealing engagement therewith and having an inlet opening aligned with said outlet opening, said sump having side walls and a bottom wall with a bottom drain opening and an adjacent vmve seat, a vertically adjustable open ended drain tube aligned with said drain opening and valve seat and extending through said sump and upwardly therefrom into said compartment, said tube being removable from said sump upwardly into said compartment, a pump comprising an impeller chamber with an intake opening through a side wall of said sump and an impeller in said chamber removable therefrom through said intake opening into said sump, said pump having a discharge connected to said spray means, said tube having at its lower end a valve element cooperating with said valve seat to close said drain opening to the interior of said sump when said tube is in its fully lowered and closed position, another side wall of said sump having an access opening of a size to accommodate passage therethrough of said pump impeller, a cover plate for said access opening removably mounted on said other side wall, and means carried by said cover plate for moving said tube to its said fully lowered and closed position and to an upper open position with said valve element spaced above said valve seat effective for opening the interior of said sump to said drain opening.

3. In a dish washing machine comprising an upper washing compartment and spray means therein, said compartment having a bottom wall provided with an outlet opening, a sump underlying said bottom wall in sealing engagement therewith and having an inlet opening aligned with said outlet opening, said sump having side walls and a bottom wall with a bottom drain opening and an adjacent valve seat, a vertically adjustable open ended drain tube aligned with said drain opening and valve seat and extending through said sump and up- Wardly therefrom into said compartment, a pump comprising anirnpeller chamber with an intake opening through a side wall of said sump and an impeller in said chamber removable therefrom through said intake opening into said sump, said pump having a discharge connected to said spray means, said tube having at its lower end a valve element cooperating with said valve seat to close said drain opening to the interior of said sump when said tube is in its fully lowered and closed position, a guide bracket secured to said bottom wall of said compartment and bridging said outlet opening, a guide rib fixed to said tube lengthwise thereof, said bracket having contiguous openings slidably receiving said rib and the upper portion of said tube, the latter having at its lower end a valve element cooperating with said valve seat to close said drain opening to the interior of said sump when said tube is in its fully lowered and closed position, another side wall of said sump having an access opening of a size to accommodate passage therethrough of said pump impeller, a cover plate for said access opening removably mounted on said other side wall, a shat carried by said plate rock-ably mounted therethrough, and a cam secured on the inner end of said shaft and cooperating with said rib for moving smd tube to an upper open drain position and a lower closed position incident to turning of said shaft from a first position to a second position and vice versa.

4. In a dish washing machine comprising an upper washing compartment and spray means therein, said compartment having a bottom wall provided with an outlet opening, a sump underlying said bottom wall in scalling engagement therewith and having an inlet opening aligned with said outlet opening, said sump having side walls and a bottom wall with a bottom drain opening and an adjacent valve seat, a vertically adjustable open ended drain tube aligned with said drain opening and valve seat and extending up wardly through said sump into said compartment, a pump comprising an impeller chamber With an intake opening through a side wall of said sump and a discharge connected to said spray means, a mounting bracket secured to said chamber and provided with an inner outwardly extending sleeve, an impeller assembly comprising an impeller mounted in said chamber and having a shaft extending through said sleeve with a r seal on said shaft and fitting in said sleeve, said shaft having a coupling sleeve extending outwardly beyond said inner sleeve into said bracket, the latter having an opening giving access to said coupling sleeve, a motor having a shaft extending into said coupling sleeve and detachably secured thereto, said impeller assembly being removable as a unit through said intake opening, another wall of said sump having an access opening of a size to accommodate passage therethrough of said impeller assembly, a removable cover plate closing said access opening, and cooperating means carried by said plate and tube for raising and lowering the latter to an open draining position spaced above said valve seat and a lower closed position seating on said valve seat respectively.

5. In a dish washing machine comprising an upper Washing compartment and spray means therein, said compantment having a bottom wall provided with an outlet opening, a sump underlying said bottom wall in sea-1- ing engagement therewith and having an inlet opening aligned with said outlet opening, said sump having side walls and a bottom wall with a bottom drain opening and an adjacent valve seat, a vertically adjustable open ended drain tube aligned with said drain opening and valve seat extending upwardly through said sump into said compartment, a pump comprising an impeller chamber with an intake opening through a side wall of said sump and a discharge connected to said spray means, an impeller assembly comprising an impeller mounted in said chamber and removable therefrom through said intake opening, a motor having a detachable driving connection to said assembly, another wall of said sump having an access opening of a size to accommodate passage therethrough of said impeller assembly, a removable cover plate closing said access opening, and cooperating means carried by said sump and tube for raising and lowering the latter to an open draining posiiton spaced above said valve seat and a lower closed position seating on said valve seat respectively.

6. In a dish washing machine comprising an upper washing compartment and spray means therein, said compartment having a bottom Wall provided with an outlet opening, a sump underlying said bottom wall in sealing engagement therewith and having an inlet opening aligned with said outlet opening, said sump having side walls and a bottom wall with a bottom drain opening and an adjacent valve seat, a vertically adjustable open ended drain tube aligned with said drain opening and valve seat and extending upwardly through said sump into said compartment, a pump comprising an impeller chamber with an intake opening through a side wall of said sump and a discharge connected to said spray means, an impeller mounted in said chamber removable therefrom through said intake opening, a suction ring having a base seating on the inner face of said side wall and extending through said intake opening into proximity to said impeller, another wall of said sump having an access opening of a size to accommodate passage therethrough of said impeller and ring, a removable cover plate closing said access opening, cooperating means carried by said plate and ring for holding the latter seated, and cooperating means carried by said plate and tube for raising and lowering the latter to an open draining position spaced above said valve seat and a lower closed position seating on said valve seat respectively.

7. In a dish washing machine comprising an upper washing compartment and spray means therein, said compartment having a bottom wall provided with an outlet opening, a sump underlying said bottom wall in sealing engagement therewith and having an inlet opening aligned with said outlet opening, said sump having side walls and a bottom wall with a bottom drain opening and an adjacent valve seat, a vertically adjustable open ended drain tube aligned with said drain opening and valve seat and extending upwardly through said sump into said compartment, a pump comprising an impeller chamber with an intake opening through a side wall of said sump and a discharge connected to said spray means, an impeller mounted in said chamber removable therefrom through said intake opening, a suction ring having a base seating on the inner face of said side wall and extending through said intake opening into proximity to said impeller, said ring having a vortex suppressing vane extending inwardly of said sump, another Wall of said sump having an access opening of a size to accommodate passage therethrough of said impeller and ring, a removable cover plate closing said opening, a rod carried by said plate and engaging said vane effective for holding said ring in seated position, and cooperating means carried by said plate and tube for raising and lowering the latter to an open draining posiiton spaced above said valve seat and a lower closed position seating on said valve seat respectively.

v8. In a dish washing machine comprising an upper washing compartment and spray means therein, said compartment having a bottom wall provided with an outlet opening, a sump underlying said bottom wall in sealing engagement therewith and having an inlet opening aligned with said outlet opening, said sump having side walls and a bottom Wall with a bottom drain opening and an adjacent valve seat, a vertically adjustable open ended drain tube aligned with said drain opening and valve seat and extending upwardly through said sump into said compartment, a pump comprising an impeller chamber with an intake opening through a side wall of said sump and a discharge connected to said spray means, an impeller mounted in said chamber removable therefrom through said intake opening, a suction ring having a base seating on the inner face of said side wall and extending through said intake opening into proximity to said impeller, another wall of said sump having an access opening of a size to accommodate passage therethrough of said impeller and ring, a removable cover plate closing said access opening, cooperating means carried by said plate and ring effective for holding the latter in seated position, and cooperating means carried by said plate and tube for raising and lowering the latter to an open draining position spaced above said valve seat and a lower closed position seating on said valve seat respectively.

References Cited in the file of this patent UNITED STATES PATENTS 1,559,727 Merseles et a1 Nov. 3, 1925 1,658,413 Patelski Feb. 7, 1928 2,063,746 Meeker Dec. 8, 1936 2,235,196 Bilde Mar. 18, 1941 2,562,772 Clark July 31, 1951 2,677,382 Cashing May 4, 1954 2,308,842 Pollock et al Oct. 8, 1957 3,079,936 Hookett et al Mar. 5, 1963 FOR IGN PATENTS 417,822 Italy Ian. 29, 1947 

1. IN A DISH WASHING MACHINE COMPRISING AN UPPER WASHING COMPARTMENT AND SPRAY MEANS THEREIN SAID COMPARTMENT HAVING A BOTTOM WALL PROVIDED WITH AN OUTLET OPENING, A SUMP UNDERLYING SAID BOTTOM WALL IN SEALING ENGAGEMENT THEREWITH AND HAVING AN INLET OPENING ALIGNED WITH SAID OUTLET OPENING, SAID SUMP HAVING SIDE WALLS AND A BOTTOM WALL WITH A BOTTOM DRAIN OPENING AND AN ADJACENT VALVE SEAT, A VERTICALLY ADJUSTABLE OPEN ENDED DRAIN TUBE ALIGNED WITH SAID DRAIN OPENING AND VALVE SEAT AND EXTENDING THROUGH SAID PUMP AND UPWARDLY THEREFROM INTO SAID COMPARTMENT, A PUMP COMPRISING AN IMPELLER CHAMBER WITH AN INTAKER OPENING THROUGH A SIDE WALL OF SAID SUMP AND AN IMPELLER IN SAID CHAMBER REMOVABLE THEREFROM THROUGH SAID INTAKE OPENING INTO SAID SUMP, SAID PUMP HAVING A DISCHARGE CONNECTED TO SAID SPRAY MEANS, SAID TUBE HAVING AT ITS LOWER END A VALVE ELEMENT COOPERATING WITH SAID VALVE SEAT TO CLOSE SAID DRAIN OPENING TO THE INTERIOR OF SAID SUMP WHEN SAID TUBE IS IN ITS FULLY LOWERED AND CLOSED POSITION, MEANS FOR MOVING SAID TUBE TO ITS SAID FULLY LOWERED AND CLOSED POSITION AND TO AN UPPER OPEN POSITION WITH SAID VALVE ELEMENT SPACED ABOVE SAID VALVE SEAT EFFECTIVE FOR OPENING THE INTERIOR OF SAID SUMP TO SAID DRAIN OPENING, ANOTHER SIDE WALL OF SAID SUMP HAVING AN ACCESS OPENING OF A SIZE TO ACCOMMODATE PASSAGE THERETHROUGH OF SAID PUMP IMPELLER, AND A COVER PLATE FOR SAID ACCESS OPENING REMOVABLY MOUNTED ON SAID OTHER SIDE WALL. 